Pins from A8 to A11 cannot be used on Arduino Giga R1

[mzap-bit]

Hello guys,

I am struggling to acquire a signal using A8,A9,A10, A11 pins of Arduino Giga R1.

Here's the modified example code I am using:

#include <Arduino_AdvancedAnalog.h>

AdvancedADC adc(A8.get()); // I must use this method to avoid compiler error
// AdvancedADC adc(PC_2C); // this doesn't wok as well I assume AdvancedAnalog relies on pins_arduino.h definitions (where the PureAnalogPins are not defined)
uint64_t last_millis = 0;

void setup() {
    Serial.begin(9600);

    // Resolution, sample rate, number of samples per channel, queue depth.
    if (!adc.begin(AN_RESOLUTION_16, 16000, 32, 128)) {
        Serial.println("Failed to start analog acquisition!");
        while (1);
    }
}

void loop() {
    if (adc.available()) {
        SampleBuffer buf = adc.read();
        // Process the buffer.
        if ((millis() - last_millis) > 20) {
          Serial.println(buf[0]);   // Sample from first channel
          Serial.println(buf[1]);   // Sample from second channel
          last_millis = millis();
        }
        // Release the buffer to return it to the pool.
        buf.release();
    }
}

The code compiles, but the serial values are showing values as if the pin is floating (despite I have placed a 1k resistor to 3.3V).

[leonardocavagnis]

Hi @mzap-bit,

Currently, the library does not support PureAnalogPin on the Arduino GIGA R1 (A8, A9, A10, and A11). We will address this issue in the next release.

Thank you for reporting it.

[mzap-bit]

Hi @leonardocavagnis ,

You're welcome! Thank you for your great work! :)

Just a small hint for the API doc: currently it is mentioned the Pins from A8 to A11 are actually supported, I've spent some time wondering what was wrong with my code trusting this info! A slight update might help other users!